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Q11. - (Topic 3) 

In AWS, which security aspects are the customer’s responsibility? Choose 4 answers 

A. Controlling physical access to compute resources 

B. Patch management on the EC2 instance s operating system 

C. Encryption of EBS (Elastic Block Storage) volumes 

D. Life-cycle management of IAM credentials 

E. Decommissioning storage devices 

F. Security Group and ACL (Access Control List) settings 

Answer: B,C,E,F 


Q12. - (Topic 1) 

You have a web application leveraging an Elastic Load Balancer (ELB) In front of the web servers deployed using an Auto Scaling Group Your database is running on Relational 

Database Service (RDS) The application serves out technical articles and responses to them in general there are more views of an article than there are responses to the article. On occasion, an article on the site becomes extremely popular resulting in significant traffic Increases that causes the site to go down. 

What could you do to help alleviate the pressure on the infrastructure while maintaining availability during these events? 

Choose 3 answers 

A. Leverage CloudFront for the delivery of the articles. 

B. Add RDS read-replicas for the read traffic going to your relational database 

C. Leverage ElastiCache for caching the most frequently used data. 

D. Use SOS to queue up the requests for the technical posts and deliver them out of the queue. 

E. Use Route53 health checks to fail over to an S3 bucket for an error page. 

Answer: A,C,E 


Q13. - (Topic 1) 

Your application currently leverages AWS Auto Scaling to grow and shrink as load Increases/ decreases and has been performing well Your marketing team expects a steady ramp up in traffic to follow an upcoming campaign that will result in a 20x growth in traffic over 4 weeks Your forecast for the approximate number of Amazon EC2 instances necessary to meet the peak demand is 175. 

What should you do to avoid potential service disruptions during the ramp up in traffic? 

A. Ensure that you have pre-allocated 175 Elastic IP addresses so that each server will be able to obtain one as it launches 

B. Check the service limits in Trusted Advisor and adjust as necessary so the forecasted count remains within limits. 

C. Change your Auto Scaling configuration to set a desired capacity of 175 prior to the launch of the marketing campaign 

D. Pre-warm your Elastic Load Balancer to match the requests per second anticipated during peak demand prior to the marketing campaign 

Answer:


Q14. - (Topic 3) 

How can an EBS volume that is currently attached to an EC2 instance be migrated from one Availability Zone to another? 

A. Simply create a new volume in the other AZ and specify the original volume as the source. 

B. Detach the volume, then use the ec2-migrate-volume command to move it to another AZ. 

C. Create a snapshot of the volume, and create a new volume from the snapshot in the other AZ. 

D. Detach the volume and attach it to another EC2 instance in the other AZ. 

Answer:

Explanation: Reference: 

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumes.html 


Q15. - (Topic 2) 

A user has setup Auto Scaling with ELB on the EC2 instances. The user wants to configure that whenever the CPU utilization is below 10%, Auto Scaling should remove one instance. How can the user configure this? 

A. The user can get an email using SNS when the CPU utilization is less than 10%. The user can use the desired capacity of Auto Scaling to remove the instance B. Use CloudWatch to monitor the data and Auto Scaling to remove the instances using scheduled actions 

C. Configure CloudWatch to send a notification to Auto Scaling Launch configuration when the CPU utilization is less than 10% and configure the Auto Scaling policy to remove the instance 

D. Configure CloudWatch to send a notification to the Auto Scaling group when the CPU Utilization is less than 10% and configure the Auto Scaling policy to remove the instance 

Answer:

Explanation: 

Amazon CloudWatch alarms watch a single metric over a time period that the user specifies and performs one or more actions based on the value of the metric relative to a given threshold over a number of time periods. The user can setup to receive a notification on the Auto Scaling group with the CloudWatch alarm when the CPU utilization is below a certain threshold. The user can configure the Auto Scaling policy to take action for removing the instance. When the CPU utilization is below 10% CloudWatch will send an alarm to the Auto Scaling group to execute the policy. 


Q16. - (Topic 2) 

A user has configured ELB with three instances. The user wants to achieve High Availability as well as 

redundancy with ELB. Which of the below mentioned AWS services helps the user achieve this for ELB? 

A. Route 53 

B. AWS Mechanical Turk 

C. Auto Scaling 

D. AWS EMR 

Answer:

Explanation: 

The user can provide high availability and redundancy for applications running behind Elastic Load Balancer by enabling the Amazon Route 53 Domain Name System (DNS. failover for the load balancers. Amazon Route 53 is a DNS service that provides reliable routing to the user’s infrastructure. 


Q17. - (Topic 2) 

A user has launched 10 instances from the same AMI ID using Auto Scaling. The user is trying to see the 

average CPU utilization across all instances of the last 2 weeks under the CloudWatch console. How can the user achieve this? 

A. View the Auto Scaling CPU metrics 

B. Aggregate the data over the instance AMI ID 

C. The user has to use the CloudWatchanalyser to find the average data across instances 

D. It is not possible to see the average CPU utilization of the same AMI ID since the instance ID is different 

Answer:

Explanation: 

Amazon CloudWatch is basically a metrics repository. Either the user can send the custom data or an AWS product can put metrics into the repository, and the user can retrieve the statistics based on those metrics. The statistics are metric data aggregations over specified periods of time. Aggregations are made using the namespace, metric name, dimensions, and the data point unit of measure, within the time period that is specified by the user. To aggregate the data across instances launched with AMI, the user should select the AMI ID under EC2 metrics and select the aggregate average to view the data. 


Q18. - (Topic 2) 

A user has created an ELB with the availability zone US-East-1A. The user wants to add more zones to ELB to achieve High Availability. How can the user add more zones to the existing ELB? 

A. It is not possible to add more zones to the existing ELB 

B. The only option is to launch instances in different zones and add to ELB 

C. The user should stop the ELB and add zones and instances as required 

D. The user can add zones on the fly from the AWS console 

Answer:

Explanation: 

The user has created an Elastic Load Balancer with the availability zone and wants to add more zones to the existing ELB. The user can do so in two ways: 

From the console or CLI, add new zones to ELB; 

Launch instances in a separate AZ and add instances to the existing ELB. 


Q19. - (Topic 1) 

You are creating an Auto Scaling group whose Instances need to insert a custom metric into CloudWatch. 

Which method would be the best way to authenticate your CloudWatch PUT request? 

A. Create an IAM role with the Put MetricData permission and modify the Auto Scaling launch configuration to launch instances in that role 

B. Create an IAM user with the PutMetricData permission and modify the Auto Scaling launch configuration to inject the userscredentials into the instance User Data 

C. Modify the appropriate Cloud Watch metric policies to allow the Put MetricData permission to instances from the Auto Scaling group 

D. Create an IAM user with the PutMetricData permission and put the credentials in a private repository and have applications on the server pull the credentials as needed 

Answer:


Q20. - (Topic 1) 

When an EC2 EBS-backed (EBS root) instance is stopped, what happens to the data on any ephemeral store volumes? 

A. Data will be deleted and win no longer be accessible 

B. Data is automatically saved in an EBS volume. 

C. Data is automatically saved as an EBS snapshot 

D. Data is unavailable until the instance is restarted 

Answer: